The Windows operating system has this central database that it uses constantly, while your computer is running. Better know as the Windows registry, it is essential for your PC’s operation. It’s hidden away where you won’t see it, and only advanced users ever meddle with it. And yet, some helpful apps offer to clean and maintain it. I need to warn you off of that sort of thing, right now. Please: Avoid using registry cleaners!
The Windows registry can take care of itself. Some cleaning software may purport to be able to improve your system performance, by tweaking your registry, but please be wary. Microsoft has long held the stance that you don’t need to “maintain” their registry. Running a registry cleaner can put your system at risk! Malwarebytes echoes this view, and also suggests that registry cleaners only appear to help, due to the placebo effect.
There are plenty of other warnings out there about the uselessness and dangers of registry cleaners, but let me be the latest: You can seriously harm your PC by using a registry cleaner. An explicit example: Joe Customer just called me about his computer that suddenly will not boot up. He presses the power button, the Windows Logo briefly appears, and then he gets a BlueScreen error. His system then restarts and loops back to the same message. As of now, he’s “dead in the water.” And the last thing he did, before this problem, was he ran his Registry Cleaner and then rebooted.
I can get him back on dry ground, with a System Restore, or a Windows Reset. With some luck, we won’t need a complete system wipe. But Joe is currently anguished and panicked, and very worried about his files. I don’t wish these kinds of feelings on anyone. Save yourself some stress and avoid using registry cleaners.